本文介绍了一种新的测量电源电动势的方法，即用示波器测电池的电动势和内电阻。
The essay introduces a new method to measure electromotive force of source, That is using oscilloscope comparative law to measure electromotive force and internal resistance of source.
对于在电源故障情况下的电力，可利用主轴电机的反电动势。
For the power in case of a power failure, back electromotive force of a spindle motor can be utilized.
讨论了用伏特计代替电位差计测电源的电动势和内阻的新方法。
A new method of measuring electromotive force and internal resistance of source using voltmeter instead of potentiometer was studied.
在电动机里电流是由外电源供给的感生电动势的方向和电枢电流i方向相反。
Years in the motor current is outside the power supply from the induced electromotive force and the direction of armature current I in opposite directions.
在电动机里电流是由外电源供给的感生电动势的方向和电枢电流i方向相反。
Years in the motor current is outside the power supply from the induced electromotive force and the direction of armature current I in opposite directions.
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